Process of making pins.



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HENRY WOLCOTT, 0F PROVIDENCE, RHODE ISLAND.

PROCESS FOR MAKING' PINS.

amiss.

To all whom rit may concern:

Be it known that I, HENRY VoLco'rT, a citizen of the United States,residing at Providence, in the county of Providence and State of RhodeIsland, have invented certain new and useful Improvements in Processesfor Making Pins, of which the following is a specification.

My invention relates to a process for making cuffq pins, shirt waistpins, beauty pins, and like devices, but more particularly to the bodyportions thereof.

rIhe object of the invention is to provide a process or method ofconstruction wherein seamless met-al tubing, either plated or unplated,may be utilized; whereby a solder seam longitudinally of the body may beavoided; by means of which the manufacture may be simplified, the costlessened, and the appearance improved; and whereby the resulting bodymay be rendered both strong and light.

To the above ends essentially my invention consists in the novel stepsfalling within the scope of the claims hereto appended.

In the accompanying drawings which form a part of this specification,Figure 1 is a perspective View of a tubular blank from which the pinbodies are ultimately formed, Fig. 2, a longitudinal central sect-ion ofa pair of swaging dies, Fig. 3, a transverse section of the same on linea@ .fr of Fig. 2, Fig. 14;, a side elevation of the tube after theaction thereon of the swaging dies. Figs. 5 and 6, side and endelevations respectively of a severed unit, Figs. 7 and 8, respectivelylongitudinal and transverse sections of the forming dies, Fig. 9, a sideelevation of the complete pin, and Fig. 10, a section of the same online e e of Fig. 9.

Like characters of reference indicate like part-s throughout the views.

In carrying out my process a metallic, preferably seamless, tube A isemployed. This tube may be of any desired metal such as gold, silver, ora composition metal plated with precious metal. This tube is contractedby compression at regular intervals throughout its length, forming aconnected series of hollow oblong unit-s B with conoidal end portions Z;at their points of connection c, all as shown in Fig. 4.

One convenient means for performing the contraction or compression stepis that Specification of Letters Patent.

Application filed February 17, 1910.

Patented Oct. 18, 1910.

Serial No. 544,433.

shown in Figs. 2 and 3, comprising upper and lower swaging dies D and Erespectively. The die D is provided with a series of oblong cavities (Zwith semi-conoidal end portions CZ communicating with each other inlongitudinal alinement. The companion die E has corresponding cavitiese, conoidal portions c similarly arranged and adapted to register withthe cavities d. The tube i is inserted into and between the dies D and Ein a direction from right to left as viewed in Figl, during thevibration of the dies.

The units B are individually broken or cut apart at the points cmanually or otherwise after the tube A is removed from the swaging dies,and then appear as shown in Figs. 5 and 6.

In order more perfectly to conform the unit B to a desirable shape for apin body, it is longitudinally flattened upon at least one side. Aconvenient means for effecting this end are the forming dies G and H.The former is provided in its bottom face with an oblong curved cavity,g, preferably provided further with artistically arranged smallercavities g to impart an ornamental surface to the resulting pin. Thecompanion or lower die II has either a smooth upper face or is providedwith a shallow cavity /L in its face adapted to register with the cavityg, as shown in Figs. T and S. The cooperative aet-ion of these formingdies flattens one side of the unit relatively to the remainder of thebody, and smooths the ends of the latter.

After the described step the body B, sometimes with a surfaceornamentation as i, has soldered to its flattened portion or back j theusual catch 7c and joint Z, the latter having the usual pin tongue mmounted therein, all as shown in Figs. 9 and 10.

The continuous hammering action of the swaging dies D and E upon thetube A while of great advantage in simultaneously forming the requiredunits, at the same time somewhat hardens the walls of the tube, and careshould be exercised during this step in order that the hardening be notexcessive.

That I claim is,-

1. A process for making pins of the type set forth, consisting in firstcompressing at intervals the wall of a metallic tube to form a series ofunits, next severing the units at their points of compression, and thenflattening auside of a unit longitudinally by compression.

2. A process for making pins of the type set forth consisting in bendingthe ends of a 5 metallic tube into a unit having conoidal ends, andlongitudinally attening a portion of the unit.

In testimony whereof I have ailxed my gnature in presence of twoWitnesses.

HoRATIo E. BELLoWs, WALTER LoUIs FROST.

